Telephone tone when searching a correspondent. This is a sound wave frequency of 440 Hz sinusoidal, slightly clipped. This sound is easy to loop. UCS Category: COMTelph. Duration: 00:01.
Beep of a truck goes back. This sound was made on computer. It is a sinusoidal wave of frequency 1130 Hz. Easy to loop. UCS Category: BEEPVeh. Duration: 00:19.
The message "This is an important message" in international Morse (sound) alphabet. the Morse is formed of "dit" and "dah" (of points and features). 1 "dah" equals 3 "dit". The spaces between the letters are equivalent to 1 "dah". Ends with a space between the words equivalent to 7 "dit". Realized on a computer with a sine wave of 615 Hz. For more information on Morse: en.wikipedia.org/wiki/Morse_code. UCS Category: COMTelm. Duration: 00:23.